/// <summary>
/// Load a RBF layer.
/// </summary>
/// <param name="xmlin">The XML to read from.</param>
/// <returns>The object that was loaded.</returns>
public IEncogPersistedObject Load(ReadXML xmlin)
{
int neuronCount = 0;
int x = 0;
int y = 0;
int dimensions = 1;
IRadialBasisFunction[] rbfs = new IRadialBasisFunction[0];
String end = xmlin.LastTag.Name;
while (xmlin.ReadToTag())
{
if (xmlin.IsIt(BasicLayerPersistor.PROPERTY_NEURONS, true))
{
neuronCount = xmlin.ReadIntToTag();
}
else if (xmlin.IsIt(BasicLayerPersistor.PROPERTY_X, true))
{
x = xmlin.ReadIntToTag();
}
else if (xmlin.IsIt(BasicLayerPersistor.PROPERTY_Y, true))
{
y = xmlin.ReadIntToTag();
}
else if (xmlin.IsIt(RadialBasisFunctionLayerPersistor.PROPERTY_RBF,
true))
{
rbfs = LoadAllRBF(xmlin);
}
else if (xmlin.IsIt(end, false))
{
break;
}
}
RadialBasisFunctionLayer layer = new RadialBasisFunctionLayer(neuronCount);
layer.RadialBasisFunction = rbfs;
layer.X = x;
layer.Y = y;
return layer;
}
/// <summary>
/// Generate the RBF network.
/// </summary>
/// <returns>The neural network.</returns>
public BasicNetwork Generate()
{
ILayer input = new BasicLayer(new ActivationLinear(), false,
this.inputNeurons);
ILayer output = new BasicLayer(new ActivationLinear(), false, this.outputNeurons);
BasicNetwork network = new BasicNetwork();
RadialBasisFunctionLayer rbfLayer = new RadialBasisFunctionLayer(
this.hiddenNeurons);
network.AddLayer(input);
network.AddLayer(rbfLayer, SynapseType.Direct);
network.AddLayer(output);
network.Structure.FinalizeStructure();
network.Reset();
network.TagLayer(RBF_LAYER, rbfLayer);
rbfLayer.RandomizeRBFCentersAndWidths(this.inputNeurons, -1, 1, RBFEnum.Gaussian);
int y = PatternConst.START_Y;
input.X = PatternConst.START_X;
input.Y = y;
y += PatternConst.INC_Y;
rbfLayer.X = PatternConst.START_X;
rbfLayer.Y = y;
y += PatternConst.INC_Y;
output.X = PatternConst.START_X;
output.Y = y;
return network;
}
private void SaveRBF(WriteXML xmlout, RadialBasisFunctionLayer layer)
{
xmlout.BeginTag(RadialBasisFunctionLayerPersistor.PROPERTY_RBF);
foreach (IRadialBasisFunction rbf in layer.RadialBasisFunction)
{
xmlout.BeginTag(rbf.GetType().Name);
xmlout.AddProperty(PROPERTY_CENTERS, rbf.Centers, rbf.Centers.Length);
xmlout.AddProperty(PROPERTY_PEAK, rbf.Peak);
xmlout.AddProperty(PROPERTY_WIDTH, rbf.Width);
xmlout.EndTag();
}
xmlout.EndTag();
}
/// <summary>
/// Construct the LMA object.
/// </summary>
/// <param name="network">The network to train. Must have a single output neuron.</param>
/// <param name="training">The training data to use. Must be indexable.</param>
public SVDTraining(BasicNetwork network, INeuralDataSet training)
{
ILayer outputLayer = network.GetLayer(BasicNetwork.TAG_OUTPUT);
if (outputLayer == null)
{
throw new TrainingError("SVD requires an output layer.");
}
if (outputLayer.NeuronCount != 1)
{
throw new TrainingError("SVD requires an output layer with a single neuron.");
}
if (network.GetLayer(RadialBasisPattern.RBF_LAYER) == null)
throw new TrainingError("SVD is only tested to work on radial basis function networks.");
rbfLayer = (RadialBasisFunctionLayer)network.GetLayer(RadialBasisPattern.RBF_LAYER);
this.Training = training;
this.network = network;
this.trainingLength = (int)this.Training.InputSize;
BasicNeuralData input = new BasicNeuralData(this.Training.InputSize);
BasicNeuralData ideal = new BasicNeuralData(this.Training.IdealSize);
this.pair = new BasicNeuralDataPair(input, ideal);
}